Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Work done to reach the point where the gravitational potential is zero
- Bolter
- · Replies 3 ·
Time dilation between two frames
- penroseandpaper
- · Replies 4 ·
Refraction at grazing incidence
- nilic1
- · Replies 10 ·
Single lens creating a diffraction pattern?
- jisbon
- · Replies 6 ·
Finding distance from velocity, force, momentum, mass, and time
- ari-anne
- · Replies 5 ·
[Special Relativity] Test Particle Inside the Sun's Gravitational Field
- Athenian
- · Replies 41 ·
Kinetic energy of alpha and beta particles from radioactive decay
- Hemanta
- · Replies 4 ·
Determine the Electrical potential at a given point
- Karl Karlsson
- · Replies 7 ·
Specific heat and Debye temperature relationship with temperature
- patric44
- · Replies 10 ·
Correct statement regarding a conductor in a magnetic field
- songoku
- · Replies 11 ·
Collision between a block and a curved up-ramp surface
- rashida564
- · Replies 11 ·
Gauge pressure of water oozing out of a pipe
- brotherbobby
- · Replies 11 ·
Why Do Light Beams Need to Be Parallel in Young's Double Slit Experiment?
- Crystal037
- · Replies 7 ·
Calculating the magnetic field of an infinite solenoid
- Adesh
- · Replies 4 ·
The definition of the proper time
- shallod
- · Replies 3 ·
Deriving the electrostatic pressure of a water droplet
- etotheipi
- · Replies 16 ·
Calculating shear stress, direct stress and factor of safety
- jordanbeaton
- · Replies 2 ·
Time period of a periodic function
- Kaushik
- · Replies 3 ·
Time period of an object traveling in an elliptical orbit
- Saptarshi Sarkar
- · Replies 10 ·
Find the velocity of the wind relative to the boat
- gnits
- · Replies 6 ·
Find the force so that all blocks are at rest with respect to each other
- songoku
- · Replies 20 ·
Cat chasing a dog, not in a straight path
- Bipul Neupane
- · Replies 3 ·
Why does treating a pendulum as circular motion give the right acceleration?
- rashida564
- · Replies 22 ·
CD diffraction grating experiment: varying screen distance vs CD separation
- KDPhysics
- · Replies 5 ·
How to know whether motion is simple harmonic motion or not?
- Beelzedad
- · Replies 17 ·
At what angle do we have to kick a ball up the hill for n-rebounds?
- bolzano95
- · Replies 10 ·
Proving Acute Angles from Two Equations
- Saptarshi Sarkar
- · Replies 8 ·
Time it takes for the rocket to fall down
- Noah159
- · Replies 1 ·
Motion in Electric and Magnetic Fields -- (Uni Level Dynamics)
- SianRR
- · Replies 14 ·
What are the possible quantum states of an electron relaxing from n=4 to n=3?
- jisbon
- · Replies 1 ·
How does the rotation of Earth affect the height of a tidal bulge?
- etotheipi
- · Replies 1 ·
Inclined Plane Forces - with a twist
- Spencer25
- · Replies 2 ·
Find the accelerations of all three blocks and the tension in the rope
- rashida564
- · Replies 2 ·
Understanding Total Voltage in Parallel Circuits
- physics_CD
- · Replies 6 ·
Why does my Kirchhoff's loop equation give different current values?
- nmsurobert
- · Replies 6 ·
Analyse the cutting force of this bolt cutter
- BiostudentWouter
- · Replies 4 ·
Average current around a magnetic loop that changes its shape
- Alefan_
- · Replies 5 ·
Physics: How much is this person's femur compressed?
- brittanyr
- · Replies 9 ·
Torque with an oddly shaped lever
- Mike Lessard
- · Replies 1 ·
Tension in a rope wrapped around a shaft, pulling in a mass
- rashida564
- · Replies 16 ·
Problem involving friction, with a mass being pulled up a slope
- Helena Durrant
- · Replies 1 ·
A circuit with switches, capacitators and resistors
- eyespy
- · Replies 6 ·
Magnetic field Calculation of a Square Wire Loop (with a changed segment)
- Physicslearner500039
- · Replies 1 ·
Gamma factor when doing four momentum problems
- bonbon22
- · Replies 3 ·
How can you calculate change in length without force and area units?
- chriscarson
- · Replies 9 ·
Electric field between two capacitor plates (proof)
- Harry17
- · Replies 4 ·
Circuit diagram questions -- 3 Light Bulbs in a 120V circuit
- joshqg
- · Replies 4 ·
Conventional current, magnetic fields and magnetic poles of different diagrams
- joshqg
- · Replies 16 ·
Two movable pulleys lifting a mass
- rashida564
- · Replies 28 ·
Is the Chain Rule Applied to Spherical Polar Coordinates Different?
- physconomics
- · Replies 16 ·
Pressure due to two liquids in a U-tube
- brotherbobby
- · Replies 2 ·
Why can't we choose the reference point at infinity for infinite objects?
- cemtu
- · Replies 2 ·
How do I find the angle and direction of a magnetic field?
- Physicslearner500039
- · Replies 8 ·
Spacetime Physics problem 2-2: scale readings and free-float frame on a trampoline
- benorin
- · Replies 5 ·
Electric field involving 4 point charges in a rectangle
- dcarmichael
- · Replies 1 ·
Ladder problem: why is my normal force calculation wrong?
- Icefire_16
- · Replies 1 ·
How Can I Solve for the Forces on Pruning Shears with Three Subsystems?
- wnvl1
- · Replies 2 ·
How Do You Calculate Time Ratios in Motion with Drag Force?
- tanaygupta2000
- · Replies 2 ·
Momentum transfer of brittle objects
- sbartyc
- · Replies 6 ·
Conical pendulum with height exceeding string length
- Spencer25
- · Replies 7 ·
Destructive interference with two wavelengths in a wedge
- jisbon
- · Replies 1 ·
Damped Oscillator and Oscillatory Driving Force
- physconomics
- · Replies 4 ·
What is the Relationship Between Strain and Change in Length in Hooke's Law?
- chriscarson
- · Replies 31 ·
Electron excited from the ground state to a quantum state
- jisbon
- · Replies 5 ·
Light rays passing through a glass prism
- jisbon
- · Replies 2 ·
What is the work done to move this Charge?
- Reneee
- · Replies 3 ·
Finding Angles in a Double slit experiment
- jisbon
- · Replies 4 ·
Finding the distance in an optics system
- jisbon
- · Replies 9 ·
Velocity of the center of mass of the system
- Amik
- · Replies 1 ·
What Is the Magnetic Field at Point P on the Y-Axis?
- Physicslearner500039
- · Replies 9 ·
Acceleration of a moving wedge with a falling block
- Yalanhar
- · Replies 19 ·
Kinetic energy of a ball rolling down a ramp
- kaloyan
- · Replies 3 ·
Magnetic field due to two loops
- Physicslearner500039
- · Replies 4 ·
Use of hard drive magnets to build an MHD propulsion ship
- fRod57
- · Replies 5 ·
Torque on a Beam Due to Gravity
- cs44167
- · Replies 5 ·
Why doesn't total internal reflection at the critical angle explain missing echoes?
- Nubira20
- · Replies 2 ·
Finding resultant force on charge q from two charges 2Q and Q
- Babybluedino
- · Replies 25 ·
How Do Four-Vectors with Orthogonal Dot Products Determine Each Other's Nature?
- shinobi20
- · Replies 16 ·
Griffiths Introduction to Electrodynamics (Stokes Theorem Corollary)
- cemtu
- · Replies 7 ·
Divergence of 1/r² in spherical coordinates and the delta function
- Apashanka
- · Replies 4 ·
Are T1 and T1' the same tension in a pulley system?
- rashida564
- · Replies 34 ·
How to find tension in a rope at an angle
- Icefire_16
- · Replies 11 ·
System with Pulleys and a Rope That Might Break
- rashida564
- · Replies 26 ·
Projectile Compresses a Spring Gun
- BrandonInFlorida
- · Replies 10 ·
Simple pendulum period with magnetic force below the bob
- Curious_Student
- · Replies 6 ·
Light momentum and torque on a screen with black and mirror sections
- JD_PM
- · Replies 5 ·
Why can't a rope and block be an isolated system?
- Amik
- · Replies 10 ·
Moment of inertia, conservation of angular momentum and energy
- volodymyr379
- · Replies 5 ·
Rate of fall depends on rotation?
- rzyn
- · Replies 35 ·
Water removal from grain bin with 10°C outside air and 18°C exhaust
- Gopher72
- · Replies 19 ·
Circuit Analysis of a diagram with series and parallel circuits
- joshqg
- · Replies 6 ·
Force due to Surface tension here
- Vivek98phyboy
- · Replies 11 ·
Energy of particle when under a central force
- Saptarshi Sarkar
- · Replies 11 ·
Deriving the first-order system for this governing equation
- currently
- · Replies 6 ·
Why does gravity feel weaker at the equator?
- lightlightsup
- · Replies 12 ·
What is the efficiency of the circuit?
- Baiatul122001
- · Replies 4 ·
Is work a vector quantity in physics?
- Amik
- · Replies 35 ·
Volume average of mass function
- Apashanka
- · Replies 14 ·
Forces on the archer's left hand holding a bow
- Bolter
- · Replies 20 ·
Deriving Momentum From Newton's Second Law of Motion
- tomtomtom1
- · Replies 27 ·